using UnityEngine;
using System.Collections;
using System;

public class SphereController : MonoBehaviour
{
    int layer = 0;
    Rigidbody rigidbody;

    void Start()
    {
        rigidbody = transform.GetComponent<Rigidbody>();
    }

    void Update()
    {
        changeLayer();
        changePosition();
    }

    void changeLayer()
    {
            if (Input.GetKey(KeyCode.UpArrow))
            {
                layer = 1;
            }

            if (Input.GetKey(KeyCode.DownArrow))
            {
                layer = 0;
            }

            float delta = (layer * 2f - 2f) - rigidbody.position.z;

            Vector3 velocity = rigidbody.velocity;
            velocity.z = delta * 3f;
            rigidbody.velocity = velocity;
        }
    }

    void changePosition()
    {

            Vector3 direction = Vector3.zero;

            if (Input.GetKey(KeyCode.LeftArrow))
            {
                direction = -Vector3.forward;
            }

            if (Input.GetKey(KeyCode.RightArrow))
            {
                direction = Vector3.forward;
            }

            rigidbody.AddTorque(direction * 25f);
    }